Improvement in steam-whistles



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BERNHARD WEINMANN, OF CINCINNATI, OHIO.

Letters Patent No. 84,239, dated November 17, 1868.

IMPROVEMENT IN STEAM-WHISTLES.

The Schedule-referred to :ln these Lettera Patent and making part of the same.

To all whom it lmay concern Be it known that I, BERNHARD WnnvMANN, of Cincinnati, in the county of Hamilton, and State of Ohio, have invented a new and useful Improvement in Steam-Whistles and I do hereby declare that the following is a full, clear, and exact description thereof, which will enable others skilled in the art to make' and use the same, reference being had to the accompanying drawings, forming part of this specification, in which- Figure l represents a vertical sectional view of my improved steam-whistle? Figure 2 is a side view of the lower stopper.

Figure 3 is a side View of the upper piston.

Figure 4 is a perspective view of the jam-nut.

Similar letters of reference indicate like parts. l

This invention relates to a steam-whistle, which is so constructed that the sound produced in it can be regulated at will.

The invention consists in the construction of both ends of the tube of the whistle, so as to render them adjustable, and thereby make the length of the interior of the tube variable.

A, in the drawing, represents the tube of the steamv whistle, open at both ends, and provided withone or more apertures, a, in its side, near the lower end. v

The lower end of the tube is closed, by means of a screw-plug, B, which has a shoulder, f, to it against the lower end of A, and a perforated shank, b, to it upon the tube or pipe, through which the steam is conveyed to the whistle.

-rod, D, is itted.

The lower end ofthe screwD carries a piston, E, fitting close in the tube A. The piston ,can thus be adj usted higher or 'lower at will, to make the interior of the tube longer or shorter, and to thereby vary the sounds produced by the whistle.

The piston and rod D are perforated at g, to let lthe steam escape.

By means of the jam-nut h., the piston eanbe locked in any desired positiony Instead of being fastened to a screw, the piston may be suspended from a rod, which can slide up and down through the head O, and be locked by a horizontal pin or otherwise. l

Having thus described my invention,

I claim, as new, and desire Kto secure by Letters Patentl. rIhe adjustable piston E, arranged in the upper end of a steam-whistle, substantially as herein shown and described.

2. A steam-whistle,' consisting of the tube A, plug B, which has the stem d, head e, and the adjustable piston E, all constructed substantially as herein shown and described.

. BERNHARD WEINMANN.'

Witnesses:

M. POHLMANN, `OrneIsVon SEGGERN. 

